Using Lost Foam Mold Cavity as Gate for Producing Pumping Unit Crank under Guiding of Proportional Solidification Theory
Author of the article:CHUI Jinghui;LIU Lizhong;ZHANG Dewen
Author's Workplace：Shanghai Seyi Mechanical and Electrical Technology Co.,Ltd.,Shanghai 200000,China;Hangzhou Regular Casting Equipment Co.,Ltd.,Hangzhou 311400,China;Dashihe Maintenance of the Company,Lvliang 033000,China
Key Words：lost foam casting,proportional solidification using cavity as gate
Abstract：
Pumping unit crank casting is a long and thick casting,traditionally cast by using side and lower position gating.This may result in curved arch deformation and also up-section carbon defect.After changing pouring system to step gating at the end of casting,deformation and carbon defects were overcome.According to proportional solidification theory,using lost foam mold cavity as gating,poring system was extremely simplified,not only pattern yield increased to 97%,casting quality is improved as well.
